fwts snap: unclear error message "cannot open results log 'results'"

[Heinrich Schuchardt]

I have the riscv64 snap fwts V23.09.00 installed on Ubuntu Mantic.

$ sudo /snap/bin/fwts --ebbr
/snap/fwts/904/usr/local/bin/fwts: Cannot open results log 'results' (you may need to remove it to set proper permissions).

Files result and results.log does not exist in the current directory.

In /var/log/kern.log I find this entry:

2023-09-27T07:07:21.435093+02:00 unmatched kernel: [255426.512789] audit: type=1400 audit(1695791241.430:407): apparmor="DENIED" operation="capable" class="cap" profile="snap.fwts.fwts" pid=235742 comm="snapcraft-runne" capability=2 capname="dac_read_search"

$ uname -a
Linux workstation 6.2.0-24-generic #24.1-Ubuntu SMP Fri Jun 23 00:35:17 UTC 2023 riscv64 riscv64 riscv64 GNU/Linux

The current drive is mounted as
/dev/nvme1n1p2 on /home type ext4 (rw,nosuid,relatime)

After

$ sudo touch results.log

I can run fwts.

It does not work with a chmod 666 results.log that is not owned by root.

It seems that the restrictions for the snap are a bit tight.

[Heinrich Schuchardt (xypron)]

Without sudo it works fine in my home directory.

So these questions remain:

Could the error message say 'results.log' and not 'results'? This would require moving the error message to fwts_log_open().

Could the fwts snap indicate that you have to run it in your home directory?

Best regards

Heinrich

[Ivan Hu (ivan.hu)]

for the error message of 'results.log', a patch has sent to fwts-devel,
https://lists.ubuntu.com/archives/fwts-devel/2023-November/013765.html

[Ivan Hu (ivan.hu)]

As for the "Could the fwts snap indicate that you have to run it in your home directory?"

I believe snap install with --devmode could help.

$snap install --devmode fwts
$sudo su
$/snap/bin/fwts

[Ivan Hu (ivan.hu)]

fix released on fwts 23.11.00

[Ivan Hu (ivan.hu)]

Got another issue when users specified the result file, it got more ".log"

$ fwts -r test.log acpidump
fwts: Cannot open results log 'test.log.log' (you may need to remove it to set proper permissions).

[Ivan Hu (ivan.hu)]

fix patch sent to fwts-devel,

https://lists.ubuntu.com/archives/fwts-devel/2023-December/013773.html

[Ivan Hu (ivan.hu)]

Released in fwts 24.01.00